Common protocols in intra-uterine insemination cycles
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1 Common protocols in intra-uterine insemination cycles Doç. Dr. Candan İltemir Duvan Turgut Özal Üniversitesi Tıp Fakültesi Kadın Hastalıkları ve Doğum AD
2 Ovulation induction with intra-uterine insemination Ovulation induction with intrauterine insemination (OI/IUI) is the first-line treatment for couples with; - unexplained infertility, - minimal and mild endometriosis, - co-existing male factor
3 Ovulation induction with intrauterine insemination OI/IUI are combined in order to increase fecundability Ovulation induction: monofollicular Mild ovarian hyperstimulation (MOH)/Controlled ovarian stimulation (COS): 2-3 dominant follicles
4 Common protocols in IUI cycles I) Oral drugs: - Anti-estrogens (Clomiphene citrate, tamoxifen) - Aromatase inhibitors (Letrozol, anastrazol)) II) Injectable (gonadotropins) drugs: - Human menopausal gonadotropins (HMG), - Purified or recombinant follicle-stimulating hormone (hpfsh, rfsh)
5 Common protocols in IUI cycles The advantages of oral drugs over gonadotropins for OI; Oral administration Low cost Less need for cycle monitoring Low incidence of multiple pregnancies and OHSS
6 Clomiphene Citrate Since the 1960s, clomiphene citrate (CC) is used for ovulation induction Non-steroidal triphenylethylene derivate Selective estrogen receptor modulator (SERM) Estrogen agonist and antagonist properties Acts purely as an anti-estrogen
7 Clomiphene Citrate Enclomiphene anti-estrogenic, the half-life of enclomiphene is relatively short (62%) Zuclomiphene mildly estrogenic, cleared much more slowly (38%)
8 Clomiphene Citrate Stimulating the normal endocrine mechanisms Structural similarity to estrogen Binds to estrogen receptors (extended interval) At the hypothalamic level, depletes receptor concentration (receptor recycling ) prevents accurate interpretation of circulating estrogen levels GnRH, FSH, LH
9 Clomiphene Citrate
10 Clomiphene Citrate Anovulation Unexplained infertility (with IUI) Luteal phase defect
11 Clomiphene Citrate (CC)
12 Clomiphene Citrate
13 Clomiphene Citrate Effectiveness: Anovulatory infertil women The ovulation rate: 70 85% (age, BMI, hyperandrogenemia) The pregnancy rate: 36% The live-birth rate : 29% 3-6 cycles (clomiphene-induced ovulatory cycles)
14 Clomiphene Citrate Effectiveness: in patients with unexplained infertility; CC plus timed intercourse: 5.6% PR per cycle CC plus intrauterine insemination (CC/IUI): 8.3% PR per cycle
15 Clomiphene Citrate Longer half-life (45 h) Anti-estrogenic effect Endometrial thinning Poor cervical mucus Resistance %
16 Clomiphene Citrate Clomiphene resistant; If women do not respond to the 50-mg dose, then incremental dose of 50 mg up to 150 mg are given before the patients is labelled as clomiphene resistant Clomiphene failure; one or more follicles emerge and grow, ovulation +, pregnancy (-)
17 Common protocols in IUI cycles Clomiphene- resistant anovulatory women (15-40%): Long term (8 days), high dose ( mg/dl) Clomiphene and metformin Clomiphene and glucocorticoids Pretreatment with oral contraceptive Aromatase inh Gonadotropins
18 Addition of metformin Improved ovulation in women with insulin resistance and hyperandrogenism associated with PCOS who were resistant to CC Metformin was associated with improved clinical pregnancy but there was no evidence that metformin improves live birth rates Metformin is not currently licensed for use in the management of PCOS Cochrane Database Syst Rev May
19 Metformin combined with CC Cochrane Database Syst Rev May
20 Addition of dexamethasone Clomiphene- resistant anovulatory women: DHEAS levels are > 180ug/dL Suppressing adrenal androgen, Negates the antiestrogen effect of CC on endometrium Ovulation 80 %, pregnancy 40 % Parsanezhad ME et al. Fertil Steril. 2002
21 Clomiphene failure Antiestrogenic effect!!! Early administration (day 1-5) Addition of estrogen (2mg oral /vaginal) Tamoxifen Aromatase inh Gonadotropins
22
23 Clomiphene Citrate Side effects hot flushes, breast discomfort, abdominal distension, nausea and vomiting, sleeplessness, headache, mood swings, dizziness and hair loss. Visual symptoms (visual blurring or spots)
24 Clomiphene Citrate Multiple pregnancy (7-10%) Congenital anomalies (2.3%) Miscarriage (%16-20) OHSS (uncommon) Ovarian cancer (no causal relationship)
25 Tamoxifen (TMX) Triphenylethylene derivative with a structure similar to CC, TMX zuclomiphene only the z-isomer, similar to Occupying the estrogen receptors in the hypothalamus, GnRH pulse frequency
26 Tamoxifen mg daily, Cycle day 3 for 5 days Tamoxifen is used off label to replace CC Tamoxifen seems as effective as clomiphene at increasing ovulation rates, pregnancy rates and live birth rates in anovulatory women (moderate-quality evidence) Steiner, A.Z et al, Human Reproduction 2005 Brown J et al, Cochrane Database Syst Rev. 2009
27 CC and TMX-induced ovulation Luteal phase, serum progesteron and estradiol levels During the fisrt trimester of CC pregnancies; serum progesteron level is % higher and serum estradiol level is 66 % higher than in sponteneous pregnancies There is less need for supplemental progesteron support in CC than in gonadotropin pregnancies
28 Aromatase inhibitors Letrozol (Femara)/ Anastrozol (Arimidex); A third generation aromatase inhibitors used for treatment of estrogen-positive breast cancer Reversible/selective aromatase inhibitor Prevents androgen-to-estrogens conversion - ovarian follicles - peripheral tissues - beyin
29 Aromatase inhibitors Blocks the conversion of androgens to estrogens Serum ve lokal estrojen GnRH secretion, Pituitary FSH and LH production, Monofollicular growth and ovulation Intraovarian androgens intraovarian androgens (FSH res, IGF-I ) Follicular sensitivity to FSH
30 Letrozol Alternative first-line treatment for ovulation induction in selected groups of infertile patients, - PCOS (resistans, failure) - Unexplained infertility, - Endometriosis - Estrogen dependent cancer - Coagulation defect
31 Letrozol Not associated with adverse antiestrogen effects Monofollicular (< 5% multiple pregnancy) Mid-luteal-phase serum progesterone (compared to CC cycles)
32
33 LET versus CC Pregnancy rate Miscarriage rate Live birth rate Multiple pregnancy rate no statistical difference beetwen LET and CC Misso ML et al, Aromatase inhibitors for PCOS: a systematic review and meta-analysis. Hum Reprod Update 2012
34 LET versus CC/pregnancy rate Misso ML et al, Aromatase inhibitors for PCOS: a systematic review and meta-analysis. Hum Reprod Update 2012
35 LET versus CC/live birth rate
36 LET versus CC/multiple pregnancy
37
38 Gonadotropins Indications: Hypogonadotropic anovulation (WHO Group I, unifollicular), Clomiphene-resistant, failure (WHO Group II, unifollicular), Unexplained infertility (COH/IUI)
39 Gonadotropins versus anti-estrogens Cantineau AE, et al. Cochrane Database 2007 (level 1a)
40 Gonadotropins - Human menopausal gonadotropins (HMG), - Purified or recombinant follicle-stimulating hormone (hpfsh, rfsh) - A recombinant form of human LH - Urinary hcg/rec hcg
41 Gonadotropins
42 Gonadotropins Advantages of recombinant products; higher batch-to-batch consistency, high purity, avoiding injection of potentially allergenic proteins, the likelihood of reducing the risk of infectious particles rendering the production independent of urine collection and the elimination of drugs co-extracted from urine
43 Gonadotropins
44 Gonadotrophins hmg versus r-fsh u-fsh versus r-fsh 43 trial, 3957 women Cantineau AE, Cohlen BJ, Heineman MJ. Ovarian stimulation protocols (anti-oestrogens, gonadotrophins with and without GnRH agonists/antagonists) for intrauterine insemination (IUI) in women with subfertility. Cochrane Database Syst Rev. 2007
45 Gonadotropins
46 Step-up protocol Aim; To define the effective threshold of response WHO Group I, WHO Group II (unifollicular) A low daily dose (75 IU daily) After 4 to 7 days of stimulation; TV-USG, a serum estradiol level The dose of gonadotropins may be maintained or increased, as indicated (7-12 days) The lead follicle reaches mm, hcg is administered Ovulation generally may be expected to occur approximately hours later
47 Low slow protocol Low dose step-up (PCOS); > 85 % monofollicular Starting dose: IU/day (hmg/rfsh) given for 7-14 days Step up (by 37.5 IU), ıf no follicles 10 mm after 7 days Step up every 7 days until dominant follicle appear Average stimulation duration days
48 Step-down protocol
49 Gonadotrophins
50 Modified protocol Step up and step down protocol can be combined, Starting doses (37.5/75 IU/day) gradually increased 10 mm follicul is seen by USG, the doses of gonadotropins.
51 Sequential protocol Clomiphene and gonadotropins; mg daily CC (5 days), followed by low dose FSH/hMG (75 IU daily) beginning on the last day of clomiphene therapy or the next day Treatment is monitored and individualized thereafter as in standard gonadotropin-stimulated cycles
52
53 Adjuvant GnRH agonist therapy combined treatment with a GnRH agonist and exogenous gonadotropins; Elevated endogenous LH levels (PCOS); - predispose to premature luteinization during exogenous gonadotropin stimulation - a contributing factor in the higher incidence of spontaneous miscarriage - GnRH agonist; endogenous LH levels, premature luteinization Tulppala M et al, Hum Reprod 8:7640, 1993 Manzi DL et al, Fertil Steril 63:866, 1995
54 Adjuvant GnRH agonist in OI/IUI
55 GnRH- antagonist in OI/IUI
56 LH in OI/IUI cycles Hypo-hypo (LH levels <1.2 IU/L) 35 years Poor responders PCOS previous excessive response - hmg/ rec LH supplementation from stimulation day D1, - Latter stages of follicular development, the number of developing follicles Loumaye E, et al, Hum Reprod 18:314, 2003.
57 LH supplementation in OI/IUI Actions of LH in larger and smaller follicles different; - promote larger follicle growth - regression of smaller follicles (OHSS ) - intrafollicular androgen Filicori M et al, Modulation of folliculogenesis and steroidogenesis in women by graded menotrophin administration, Hum Reprod 17:2009, 2002.
58 Monitoring Gonadotropin Therapy TV-USG, serum estradiol measurements Gonadotropins are administered in the evening (5:00 and 8:00 p.m.) Serum estradiol measurements are obtained early in the morning Estradiol levels rise at a constant exponential pace, doubling approximately every 2 3 days Serum estradiol level pg/ml per mature follicle, uhcg (5,000 or 10,000 IU) or rhcg 250 mg if the lead follicle is at least 16 mm and estradiol concentration is consistent with the number of follicles
59 Optimal follicular size? mm ( mean 25 mm) in CC cycles 23 to 28 mm range in letrozol cycles 16 mm in gonadotropin cycles;
60
61 Monitoring Gonadotropin Therapy hcg generally should not be administered; > 3 dominant follicules ( 14 mm), > 5 follicules exist > mm follicules Andersen AN, et alhum Reprod Steures P et al, Reprod Biomed Online. 2007
62 Optimal timing of IUI At least one follicle 18 mm 24 or 36 h after hcg injection IUI 36 h after hcg has marginally better pregnancy rates than 24 h Premature administration of hcg acts like a premature LH surge and may result in follicular atresia
63
64
65 Common protocols in IUI cycles Individualize the ovarian stimulation protocol CC, first line treatment agent for OI (3 ovulatory cycles) Gonadotropins, the most effective drugs when IUI is combined with OI Low dose daily, step-up protocol are advised when using gonadotropins GnRH-a, no proven advantage in OI/IUI cycles GnRH- antg, promising but needs definitive answers?? LH supplementation has a role in selected patients
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